Sentences with phrase «average concentration»

Average concentrations of gold in the leaves are much higher than normal, but individual particles of the metal are still very small, few, and far between.

The reductions in emissions could be seen in the frequency and maximum concentrations of the short - term episodic events of emissions, and the annual average concentrations.

The figure below shows that, of the men with a high or average concentration of all those hormones in their blood, about 90 percent were still alive after 6 years.

According to NOAA, monthly global average concentrations of CO2 surpassed 400 parts per million in March 2015 for the first time since the administration began tracking carbon dioxide in the atmosphere.

Science: increases in average concentrations of three greenhouse gases — carbon dioxide, methane, and nitrous oxide — in the troposphere between 1860 and 2005, mostly because of fossil fuel burning, deforestation, and agriculture.

Carbon dioxide levels «surged» at record breaking speeds last year, with globally averaged concentrations of CO2 hitting 403.3 parts per million in 2016 compared to 400 parts per million in 2015, according to the WMO's Greenhouse Gas Bulletin.

Sunbelt cities like Los Angeles, Riverside, Calif., and Houston, with their seemingly endless sunny days, gridlocked urban sprawl and heat - trapping stagnant air masses, contain the highest average concentrations of ozone, according to a 2009 study by University of California, Berkeley scientists.

Globally averaged concentrations for CO2 reached 403.3 parts per million in 2016, up from 400.00 ppm in 2015.

The change in average concentrations from February of last year to February of this year was 3.76 parts per million at the storied Mauna Loa Observatory in Hawaii, leaving the concentration at 404.02 parts per million for February, based on preliminary data.

Suppressing the contribution from anthropogenic SO2 emissions leads the domain - wide average concentrations of H2SO4 to decrease by a factor of 60 and the peak concentrations by a factor of 85 but not to zero, due to the continuing contribution from OSCs.

Worldwide, average concentrations rose 11 per cent between 1990 and 2015, according to a report by the Health Effects Institute and the Institute for Health Metrics and Evaluation, both in the US.

Reported average concentrations of nitrogen (NO3 − + NH4 +) soluble in water or in neutral salts (e.g., KCl, MgCl2 1 M) that are present in fecal material were considered as labile N species6, 45.

These column - averaged concentration retrievals respond to the net amount of CO2 passing in and out of the atmosphere under the instrument.

All the major greenhouse gases in the atmosphere, including carbon dioxide, methane and nitrous oxide, hit record high average concentrations last year.

The announcement Wednesday by the Beijing Municipal Environmental Protection Bureau followed a 2013 plan that ordered the city to reduce the yearly average concentration of particulate matter to less than 60 micrograms.

The heuristic forecast submitted by Howell in June is unchanged; below average concentrations of multi-year ice in the area will facilitate clearing.

If one assumes the the air exchanges completely in one hour (a fairly standard assumption), then the 8 - hour average concentration would be 0.025 mg / m3.]

There was a statistically significant decrease in the annual average concentrations from 2006 to 2013 and a strong correlation with annual power plant mercury emissions from the upwind states of Ohio, Pennsylvania and West Virginia.

13 Figure 20.5 Science: increases in average concentrations of three greenhouse gases — carbon dioxide, methane, and nitrous oxide — in the troposphere between 1860 and 2005, mostly because of fossil fuel burning, deforestation, and agriculture.

The bulletin reports that concentrations of carbon dioxide (CO2) in the atmosphere surged at a record - breaking speed in 2016 to the highest level in 800,000 years — with Globally averaged concentrations of CO2 reaching 403.3 parts per million in 2016, up from 400.00 ppm in 2015.

Not surprisingly, highly populated regions such as the Los Angeles, Riverside and Houston areas, where the climate is sunny for much of the year and the air mass is relatively stable, had the highest average concentrations of ozone, ranging from 62.5 to 104 ppb.

For example, the ratio of domain - wide average concentrations of MSA / H2SO4 changes from 0.005 for the 2011 — 2013 case to 0.24 for the zero fossil fuel emissions case.

To date, the global average concentration of carbon dioxide in the atmosphere has increased by nearly 27 percent between 1960 and 2015, with the expectation of a continued rise in years to come, according to the researchers.

Average concentrations of PM2.5 in Beijing stood at 73 micrograms per cubic meter in 2016, down 9.9 percent on the previous year.

Its average concentration in milk is 0.01 g / 100 ml but lactoferrin is found in higher concentration in whey protein products: 30 to 100 mg / l of sweet whey.

Featuring 10 times the average concentration, a little goes a long way.

For example, the researchers found higher - than - average concentrations of water in lunar volcanic deposits near the Moon's equator, where background water in the soil is scarce.

Notably, Terada and his colleagues say, previous studies have shown that the overall proportions of oxygen isotopes in the ozone layer also are skewed toward above - average concentrations of oxygen - 17 and oxygen - 18.

In fact, Antarctica has the highest average concentration of research personnel in the world — scientists make up 100 % of its population (which is still quite low with only 4000 «inhabitants» during the summer and about 1000 during the winter).

Average concentrations of two major air pollutants from 2000 to 2012 varied by U.S. region.

Between 1993 and 2008, the average concentration of THC in confiscated marijuana jumped from 3.4 to 8.8 percent.

The results showed that the average concentrations for black carbon and fine particulate matter were nearly double those reported by some similar studies of households in areas of lower altitude and warmer climates, such as India and Mexico.

In 2012, the EPA lowered the primary standard for the annual average concentration of PM2.5 particulates considered safe, as more information became known about their prevalence and danger to human health.

And even as the instruments in Hawaii indicated that we had reached the milestone, the global average concentration of CO2 was a few points lower.

Though the fist - sized rock is relatively dry by earthly standards, it contains between 10 and 30 times the average concentration of water found in other known martian meteorites — and it is the first to closely match certain aspects of the martian crust.

Average concentrations of particles under 2.5 micrometres were between 11 and 30 micrograms per cubic metre.

The analysis revealed that average concentrations of each class of POP were significantly higher in the 1980s than is found today, with a drop in concentration of 15 - 30 percent per decade.

The fighters at surgical risk in this study had higher - than - average concentrations of eosinophils that would still be considered normal.

Instead, the rover measured no more than a trace of methane, with an average concentration of a mere 0.18 parts per billion (SN: 10/19/13, p. 7).

The annual average concentrations of mercury declined by up to 75 % and were strongly correlated with the power plant emissions from the upwind states.

The average concentrations of DON and HT - 2 detected in beers approached 30 µg / L.

After working a shift, the average concentration of BPS in the urine of those cashiers had doubled.

In fact the average concentration of ozone is everywhere lower than the value that used to define the present ozone hole.